﻿#include<stdio.h>
int main() {
	char a;
	while ((a = getchar()) != EOF)
	{
		if (('a' <= a && a <= 'z') || ('A' <= a && a <= 'Z'))
		{
			printf("%c is an alphabet.\n", a);
		}
		else
		{
			printf("%c is not an alphabet.\n", a);
		}
		getchar();
	}
}